Online lender Bank of Internet was the subject of a formal 16-month Securities and Exchange Commission investigation, according to a report.

The company, led by Chief Executive Greg Garrabrants, was the subject of scrutiny until June — when it ceased without the SEC taking any action.

The probe was focused on alleged conflicts of interests, auditing practices, and loans made to two entities, according to subpoenas and government documents obtained by Probes Reporter, a publisher of investment research.

The documents, obtained through the Freedom of Information Act, confirmed two earlier reports by The Post that the bank was under investigation.

In April, The Post first reported that the Justice Department, the SEC, the Federal Deposit Insurance Corp., and the US Treasury’s Office of the Inspector General were investigating the bank, citing public documents obtained in an unrelated case.

At the time, Eshel Bar-Adon, the bank’s chief legal officer, said, “There are no material investigations that would require public disclosure and BofI remains in good regulatory standing.”

But Probes Reporter countered: “After reviewing the documents from BofI’s SEC probe, it strains credibility to imagine investors would not consider this investigation material and in need of disclosure.”